THRIFT-4011 Sets of Thrift structs generate Go code that can't be serialized to JSON
Client: Go
Patch: D. Can Celasun <dcelasun@gmail.com>

This closes #1156
diff --git a/test/go/src/common/simple_handler.go b/test/go/src/common/simple_handler.go
index 7bd3a30..0c9463d 100644
--- a/test/go/src/common/simple_handler.go
+++ b/test/go/src/common/simple_handler.go
@@ -77,7 +77,7 @@
 	return thing, nil
 }
 
-func (p *simpleHandler) TestSet(thing map[int32]struct{}) (r map[int32]struct{}, err error) {
+func (p *simpleHandler) TestSet(thing []int32) (r []int32, err error) {
 	return thing, nil
 }